feat(ai): generate covers without new titles

app/gui/models.py

@@ -2,7 +2,7 @@
 
 from __future__ import annotations
 
-from .. import diagnostics
+from .. import ai, appconfig, diagnostics
 from ..collect_skip import skipped_stage_text
 from .widgets import *
 
@@ -190,10 +190,15 @@ class GenerateTaskTableModel(QAbstractTableModel):
         self.db_path = db_path
         self.status_callback = status_callback
         self.last_edit_error = None
+        self.generate_mode = "title"
         self.generate_cover_enabled = False
 
     def set_generate_cover_enabled(self, enabled):
-        self.generate_cover_enabled = bool(enabled)
+        self.set_generate_mode("title_cover" if enabled else "title")
+
+    def set_generate_mode(self, mode):
+        self.generate_mode = appconfig.normalize_generate_mode(mode)
+        self.generate_cover_enabled = appconfig.generate_mode_includes_cover(self.generate_mode)
         if not self.tasks:
             return
         top_left = self.index(0, 4)
@@ -403,7 +408,10 @@ class GenerateTaskTableModel(QAbstractTableModel):
             return "失败"
         if not self.generate_cover_enabled:
             return "未启用"
-        if self._is_title_failure(task) or not self._has_new_title(task):
+        if self.generate_mode == "cover":
+            if not ai.cover_title_context(task):
+                return "未开始"
+        elif self._is_title_failure(task) or not self._has_new_title(task):
             return "未开始"
         if getattr(task, "status", None) == "running":
             return "处理中"